diff -r 41300fa6a67c -r 3b1da2848fc7 src/gui/kernel/qcocoaview_mac.mm
--- a/src/gui/kernel/qcocoaview_mac.mm	Tue Feb 02 00:43:10 2010 +0200
+++ b/src/gui/kernel/qcocoaview_mac.mm	Fri Feb 19 23:40:16 2010 +0200
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
@@ -349,7 +349,9 @@
             // since we accepted the drag enter event, the widget expects
             // future drage move events.
             // ### check if we need to treat this like the drag enter event.
-            nsActions = QT_PREPEND_NAMESPACE(qt_mac_mapDropAction)(qDEEvent.dropAction());
+            nsActions = NSDragOperationNone;
+            // Save as ignored in the answer rect.
+            qDMEvent.setDropAction(Qt::IgnoreAction);
         } else {
             nsActions = QT_PREPEND_NAMESPACE(qt_mac_mapDropAction)(qDMEvent.dropAction());
         }
@@ -357,7 +359,6 @@
         return nsActions;
     }
  }
-
 - (NSDragOperation)draggingUpdated:(id < NSDraggingInfo >)sender
 {
     NSPoint windowPoint = [sender draggingLocation];
@@ -402,13 +403,15 @@
     qDMEvent.setDropAction(QT_PREPEND_NAMESPACE(qt_mac_dnd_answer_rec).lastAction);
     qDMEvent.accept();
     QApplication::sendEvent(qwidget, &qDMEvent);
-    qt_mac_copy_answer_rect(qDMEvent);
 
     NSDragOperation operation = qt_mac_mapDropAction(qDMEvent.dropAction());
     if (!qDMEvent.isAccepted() || qDMEvent.dropAction() == Qt::IgnoreAction) {
         // ignore this event (we will still receive further notifications)
         operation = NSDragOperationNone;
+        // Save as ignored in the answer rect.
+        qDMEvent.setDropAction(Qt::IgnoreAction);
     }
+    qt_mac_copy_answer_rect(qDMEvent);
     return operation;
 }
 
@@ -505,6 +508,13 @@
     } else {
         [self setNeedsDisplay:YES];
     }
+
+    // Make sure the opengl context is updated on resize.
+    if (qwidgetprivate->isGLWidget) {
+        qwidgetprivate->needWindowChange = true;
+        QEvent event(QEvent::MacGLWindowChange);
+        qApp->sendEvent(qwidget, &event);
+    }
 }
 
 - (void)drawRect:(NSRect)aRect